[Bug rtl-optimization/23579] New: [4.1 regression] rtl-optimization/23478 breaks Ada

[schwab at suse dot de]

The patch from rtl-optimization/23478 breaks Ada:  
  
$ gdb --args ../../gnat1 -quiet -dumpbase a-stzmap.adb -O2 -W -Wall -fPIC -g  
-gnatpg -gnatO a-stzmap.o a-stzmap.adb -o /tmp/ccH9s7Af.s  
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This GDB was configured as "ia64-suse-linux"...Using host libthread_db library  
"/lib/tls/libthread_db.so.1".  
  
(gdb) r  
Starting program: /tmp/cvs/gcc-test-20050823/Build/gcc/gnat1 -quiet -dumpbase  
a-stzmap.adb -O2 -W -Wall -fPIC -g -gnatpg -gnatO a-stzmap.o a-stzmap.adb  
-o /tmp/ccH9s7Af.s  
  
Program received signal SIGSEGV, Segmentation fault.  
add_missing_bbs (before=0x200000000043ad40, first=0x20000000003c0e38,  
last=0x0)  
    at sched-ebb.c:220  
220           BB_HEAD (last) = before;  
(gdb) bt  
#0  add_missing_bbs (before=0x200000000043ad40, first=0x20000000003c0e38,   
    last=0x0) at sched-ebb.c:220  
#1  0x4000000000dbbd00 in schedule_ebbs (dump_file=0x20000000004dfc50)  
    at sched-ebb.c:329  
#2  0x4000000000b1f040 in ia64_reorg () at ia64.c:7701  
#3  0x4000000000db1b90 in rest_of_handle_machine_reorg () at reorg.c:3864  
#4  0x4000000000ac4ca0 in execute_one_pass (pass=0x60000000000156d0)  
    at passes.c:754  
#5  0x4000000000ac4f90 in execute_pass_list (pass=0x60000000000156d0)  
    at passes.c:837  
#6  0x4000000000ac4fe0 in execute_pass_list (pass=0x6000000000013338)  
    at passes.c:837  
#7  0x4000000000ac4fe0 in execute_pass_list (pass=0x6000000000013380)  
    at passes.c:837  
#8  0x40000000005dab80 in tree_rest_of_compilation (fndecl=0x20000000003eed00)  
    at tree-optimize.c:419  
#9  0x4000000000039690 in gnat_expand_body (gnu_decl=0x20000000003eed00)  
    at misc.c:636  
#10 0x4000000000b4b650 in cgraph_expand_function (node=0x20000000005af650)  
    at cgraphunit.c:1037  
#11 0x4000000000b4f8c0 in cgraph_optimize () at cgraphunit.c:1103  
#12 0x400000000003af60 in gnat_parse_file (set_yydebug=10846160) at  
misc.c:245#13 0x4000000000a57fd0 in toplev_main (argc=268536,  
argv=0x6000000000041910)  
    at toplev.c:1932  
#14 0x40000000005c71c0 in main (argc=268536, argv=0x6000000000041910)  
    at main.c:35

-- 
           Summary: [4.1 regression] rtl-optimization/23478 breaks Ada
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: schwab at suse dot de
                CC: gcc-bugs at gcc dot gnu dot org,jakub at gcc dot gnu dot
                    org
GCC target triplet: ia64-*-linux
OtherBugsDependingO 23478
             nThis:


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23579